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Mesoscale Discussion 2223
MD 2223 graphic
   
   MESOSCALE DISCUSSION 2223
   NWS STORM PREDICTION CENTER NORMAN OK
   0958 AM CDT THU SEP 16 2004
   
   AREAS AFFECTED...ERN GA THROUGH CNTRL AND ERN SC
   
   CONCERNING...SEVERE THUNDERSTORM POTENTIAL 
   
   VALID 161458Z - 161700Z
   
   THREAT FOR ISOLATED TORNADOES EXPECTED TO GRADUALLY INCREASE FROM
   PORTIONS OF ERN GA THROUGH SC INTO THE AFTERNOON. A WW MIGHT BE
   NEEDED FOR THIS AREA WITHIN THE NEXT 2-3 HOURS.
   
   LATE THIS MORNING AN E-W SURFACE BOUNDARY EXTENDS ACROSS SRN SC WWD
   INTO E CNTRL GA. S OF THIS BOUNDARY...WARM MOIST AIR FROM THE GULF
   STREAM WITH TEMPERATURES IN THE LOWER 80S AND DEWPOINTS IN THE MID
   70S IS ADVECTING NWWD. VISIBLE SATELLITE DATA ALSO SHOW CONSIDERABLE
   CLOUD BREAKS ACROSS THIS REGION...SUGGESTING SURFACE HEATING WILL
   LIKELY FURTHER CONTRIBUTE TO DESTABILIZATION. THE STRONGER LOW LEVEL
   WINDS AND SHEAR REMAIN WEST OF SC. DESPITE THIS...DIRECTIONAL SHEAR
   IS ENHANCED IN VICINITY OF THE BOUNDARY. AS IVAN CONTINUES IN A
   GENERALLY NNEWD DIRECTION...LOW LEVEL SHEAR SHOULD INCREASE FURTHER
   THIS AFTERNOON FROM ERN GA INTO PORTIONS OF SC. A GRADUAL INCREASE
   IN STORM COVERAGE AND INTENSITY IS EXPECTED AS THE ATMOSPHERE
   DESTABILIZES INTO THE AFTERNOON WITH GREATEST THREAT EXPECTED WHERE
   STORMS INTERACT WITH THE BOUNDARY.
   
   ..DIAL.. 09/16/2004
   
   
   ATTN...WFO...ILM...CHS...CAE...GSP...JAX...FFC...
   
   32478061 31468142 31868232 32798276 33968250 34638141
   34567968 33597896 
   
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